Heat recovery apparatus



FIG. 1 is a top plan view showing heater exhaust ports wherein airpasses horizontally thru the heat recovery apparatus, wherein the topand bottom view are identical;

FIG. 2 is a front side elevational view thereof showing the verticalheat recovery ports, wherein both front and back side are identical;

FIG. 3 is a side elevational view taken from FIG. 1, wherein each sideview is identical; and,

FIG. 4 is a perspective view thereof.

The heat recovery apparatus is installed in any heating unit exhaustduct and is designed to safely recover and utilize wasted heat.

The ornamental design for a heat recovery apparatus, as shown anddescribed.